no life sign from AP GR6 & TD-MX after update to 3.0.1

[3D-Cat]

First I did update my X20S to 3.0.1 TD-ISRM then updated my 2 AP GR6FB receivers to 3.0.1 without any problem.
But it didn't went well for the AP GR6 and TD-MX receivers. Although OTA update showed success there was no life sign from both receivers afterwards
Any idea how to recover the receivers.
thanks

[mgsanna]

Try to reflash instead of OTA, by wire.... and s.port directly trought the suite

[3D-Cat]

tried already, it reports device not found or not ready. LED does not light up when power the receiver

[3D-Cat]

all receivers are not usable anymore and frsky has no solution to recover them. CONGRATUALATIONS FRSKY good job

[Beastyboy80]

I updated my TD-MX today. I have to register and bind again. It works but I have no telemetry via F-Port

[3D-Cat]

it looks like AP GR6 bootloader is corrupted after updating from V1.0.10 to V3.0.1 and as described it's no more functional
if someone knows a way to reflash the bootloader without sending the RX to service please let me know how